<template>
  <div>
    <el-card class="box-card">
      <div slot="header" class="clearfix">
        <span>文章列表</span>
      </div>
      <!-- 搜索区域 -->
      <div class="search-box">
        <el-form :inline="true" :model="q">
          <el-form-item label="文章分类">
            <el-select v-model="q.cate_id" placeholder="请选择分类" size="small">
              <el-option v-for="cateItem in cataList" :key='cateItem.id' :label="cateItem.cate_name" :value="cateItem.id"></el-option>
            </el-select>
          </el-form-item>
          <el-form-item label="发布状态" style="margin-left: 15px;">
            <el-select v-model="q.state" placeholder="请选择状态" size="small">
              <el-option label="已发布" value="已发布"></el-option>
              <el-option label="草稿" value="草稿"></el-option>
            </el-select>
          </el-form-item>
          <el-form-item>
            <el-button type="primary" size="small" @click="loadArtList">筛选</el-button>
            <el-button type="info" size="small" @click="resetForm">重置</el-button>
          </el-form-item>
        </el-form>
        <!-- 发表文章的按钮 -->
        <el-button type="primary" size="small" class="btn-pub" @click="artVisible = true">发表文章</el-button>
      </div>

      <!-- 文章表格区域 -->
          <el-table
            stripe
            border
            :data="artList"
            style="width: 100%">
            <el-table-column
              label="文章标题">
              <template v-slot='{row}'>
                <el-link type="primary" @click="showDialog(row.id)">{{row.id}}</el-link>
              </template>
            </el-table-column>
            <el-table-column
              prop="cate_name"
              label="文章分类">
            </el-table-column>
            <el-table-column
              prop="pub_date"
              label="发表时间">
              <template v-slot='{row}'>
               {{formatDate(row.pub_date)}}
              </template>
            </el-table-column>
            <el-table-column
              prop="state"
              label="状态">
            </el-table-column>
            <el-table-column
              label="操作">
              <template v-slot='{row}'>
               <el-button type="danger" size="mini" @click="remRow(row.id)">删除</el-button>
              </template>
            </el-table-column>
          </el-table>

      <!-- 分页区域 -->
      <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="q.pagenum"
        :page-sizes="[1, 2, 3, 4]"
        :page-size="q.pagesize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total">
      </el-pagination>
    </el-card>
    <el-dialog
      fullscreen
      title="发表文章"
      :visible.sync="artVisible"
      width="30%"
      :before-close="handleClose">
     <el-form :model="artForm" :rules="artRules" ref="artForm" label-width="100px" class="demo-artForm">
      <el-form-item label="文章标题" prop="title">
        <el-input v-model="artForm.title" placeholder="请输入文章标题"></el-input>
      </el-form-item>
      <el-form-item label="文章分类" prop="cate_id">
        <el-select v-model="artForm.cate_id" placeholder="请选择文章分类" style="width: 100%;">
          <el-option v-for="item in cataList" :key="item.id" :label="item.cate_name" :value="item.id"></el-option>
        </el-select>
      </el-form-item>
      <el-form-item prop="content" label="文章内容">
        <quill-editor v-model="artForm.content" @blur="$refs.artForm.validateField('content')" >
        </quill-editor>
      </el-form-item>
      <el-form-item label="文章封面" prop="cover_img">
        <!-- 用来显示封面的图片 -->
        <img v-if="preview" :src="preview" alt="" class="cover-img" ref="imgRef" />
        <img v-else src="../../../assets/images/cover.jpg" alt="" class="cover-img" ref="imgRef" />
        <br />
        <!-- 文件选择框，默认被隐藏 -->
        <input type="file" style="display: none;" accept="image/*" ref="iptFile" @change="artChange"/>
        <!-- 选择封面的按钮 -->
        <el-button type="text" @click="$refs.iptFile.click()">+ 选择封面</el-button>
      </el-form-item>
      <el-form-item prop="state">
        <el-button type="primary" @click="artSubmit('已发布')">发布</el-button>
        <el-button type="info" @click="artSubmit('草稿')">存为草稿</el-button>
      </el-form-item>
     </el-form>
    </el-dialog>
    <!-- 文章详情dialog -->
    <el-dialog
      title="文章预览"
      :visible.sync="artDialVisible"
      width="65%">
       <h1 class="title">{{ artDetail.title }}</h1>

        <div class="info">
          <span>作者：{{ artDetail.nickname || artDetail.username }}</span>
          <span>发布时间：{{ formatDate(artDetail.pub_date  ) }}</span>
          <span>所属分类：{{ artDetail.cate_name }}</span>
          <span>状态：{{ artDetail.state }}</span>
        </div>

        <!-- 分割线 -->
        <el-divider></el-divider>

        <!-- 文章的封面 -->
        <img :src="'http://www.liulongbin.top:3008' + artDetail.cover_img" alt="" />

        <!-- 文章的详情 -->
        <div v-html="artDetail.content" class="detail-box"></div>
    </el-dialog>
  </div>
</template>

<script>
import dayjs from 'dayjs'
export default {
  name: 'ArtList',
  data() {
    return {
      // 查询参数对象
      q: {
        pagenum: 1,
        pagesize: 2,
        cate_id: '',
        state: ''
      },
      artVisible: false,
      artForm: {
        title: '',
        cate_id: '',
        content: '',
        cover_img: '',
        state: ''
      },
      artRules: {
        title: [
          { required: true, message: '请输入文章标题', trigger: 'blur' },
          { min: 1, max: 30, message: '文章标题的长度为1-30个字符', trigger: 'blur' }
        ],
        cate_id: [{ required: true, message: '请选择文章标题', trigger: 'change' }],
        content: [
          { required: true, message: '请输入文章标题', trigger: 'blur' }
        ],
        cover_img: [
          { required: true, message: '请输入文章标题', trigger: 'blur' }
        ]
      },
      preview: '',
      cataList: [],
      artList: [],
      total: 0,
      artDialVisible: false,
      artDetail: {}
    }
  },
  methods: {
    // 关闭dialog
    handleClose(done) {
      this.$confirm('此操作将导致文章信息丢失，是否继续？', '提示', {
        type: 'warning'
      })
        .then(_ => {
          done()
        })
        .catch(_ => {})
    },
    // 收集用于上传图片
    artChange(e) {
      const file = e.target.files[0]
      if (file) {
        // 转换为base64
        this.preview = URL.createObjectURL(file)
        this.artForm.cover_img = file
        this.$refs.artForm.validateField('cover_img')
      } else {
        this.preview = ''
        this.artForm.cover_img = ''
      }
    },
    // 发布文章
    artSubmit(state) {
      this.artForm.state = state
      this.$refs.artForm.validate(async valid => {
        console.log(valid)
        if (!valid) return
        // 转换为formdata格式
        const fd = new FormData()
        Object.keys(this.artForm).forEach(k => fd.append(k, this.artForm[k]))
        // 发送请求
        const { data: res } = await this.$http.post('/my/article/add', fd)
        // 提醒用户
        if (res.code !== 0) return this.$message.error(res.message)
        this.$message.success(res.message)
        // 关闭dalaog
        this.artVisible = false
        // 重置表单
        this.$refs.artForm.resetFields()
        // 清空图片
        this.preview = ''
      })
    },
    // 获取文章分类
    async  loadCateList() {
      const { data: res } = await this.$http.get('my/cate/list')
      this.cataList = res.data
    },
    // 获取发布文章列表
    async loadArtList() {
      const { data: res } = await this.$http.get('/my/article/list', { params: this.q })
      // 存入data中
      this.artList = res.data
      this.total = res.total
      // console.log(res.data)
    },
    // 时间格式转换
    formatDate(date) {
      return dayjs(date).format('YYYY-MM-DD HH:mm:ss')
    },
    // 删除文章发布列表
    remRow(id) {
      this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        type: 'warning'
      }).then(async() => {
        const { data: res } = await this.$http.delete('my/article/info', { params: { id } })
        // console.log(res)
        if (res.code !== 0) return this.$message.error(res.message)
        this.$message.success(res.message)
        this.loadArtList()
      }).catch(() => {
      })
    },
    // 改变页数显示列表
    handleSizeChange(val) {
      this.q.pagesize = val
      this.q.pagenum = 1
      this.loadArtList()
      console.log(`每页 ${val} 条`)
    },
    // 显示当前页面列表
    handleCurrentChange(val) {
      this.q.pagenum = val
      this.loadArtList()
      console.log(`当前页: ${val}`)
    },
    // 重置文章发布列表
    resetForm() {
      this.q = {
        pagenum: 1,
        pagesize: 2,
        cate_id: '',
        state: ''
      }
      this.loadArtList()
    },
    async showDialog(id) {
      this.artDialVisible = true
      const { data: res } = await this.$http.get('/my/article/info', { params: { id } })
      this.artDetail = res.data
    }
  },
  mounted() {
    this.loadCateList()
    this.loadArtList()
  }
}
</script>

<style lang="less" scoped>
.search-box {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  .btn-pub {
    margin-top: 5px;
  }
}
// 设置图片封面的宽高
.cover-img {
  width: 400px;
  height: 280px;
  object-fit: cover;
}
/deep/ .ql-editor {
  height: 300px;
}
.el-pagination {
  margin-top: 15px;
}
.title {
  font-size: 24px;
  text-align: center;
  font-weight: normal;
  color: #000;
  margin: 0 0 10px 0;
}

.info {
  font-size: 12px;
  span {
    margin-right: 20px;
  }
}

// 修改 dialog 内部元素的样式，需要添加样式穿透
/deep/ .detail-box {
  img {
    width: 500px;
  }
}
</style>
